<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./react/react18.development.js"></script>
    <script src="./react/react-dom18.development.js"></script>
</head>
<body>
    <button></button>
    <div class="box">

    </div>

    <script>
        var span = React.createElement("span",{title:"提示"},"内容");
       

        var p = React.createElement("p",null,span);

        var box = document.querySelector(".box");
// 创建的react对象 渲染到box这个标签内 box这个标签是一个dom标签
// ReactDOM.render(p,box);

var root = ReactDOM.createRoot(box);
console.log(root);
root.render(p);

    </script>
</body>
</html>